Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Tomas M. Janssen"'
Autor:
Chavelli M. Kensen, Rita Simões, Anja Betgen, Lisa Wiersema, Doenja M.J. Lambregts, Femke P. Peters, Corrie A.M. Marijnen, Uulke A. van der Heide, Tomas M. Janssen
Publikováno v:
Physics and Imaging in Radiation Oncology, Vol 32, Iss , Pp 100648- (2024)
Background and purpose: In online adaptive magnetic resonance image (MRI)-guided radiotherapy (MRIgRT), manual contouring of rectal tumors on daily images is labor-intensive and time-consuming. Automation of this task is complex due to substantial va
Externí odkaz:
https://doaj.org/article/d0e84928864f49dba82a2e7cc5e0c148
Publikováno v:
Physics and Imaging in Radiation Oncology, Vol 32, Iss , Pp 100636- (2024)
Background and purpose: Monte Carlo (MC) based dose calculations are widely used in radiotherapy with a low statistical uncertainty, being accurate but slow. Increasing the uncertainty accelerates the calculation, but reduces quality. In online adapt
Externí odkaz:
https://doaj.org/article/77d921fc9564492d8f860bc8f2dc24df
Publikováno v:
Physics and Imaging in Radiation Oncology, Vol 24, Iss , Pp 159-166 (2022)
Background and purpose: Strategies to limit the impact of intra-fraction motion during treatment are common in radiotherapy. Margin recipes, however, are not designed to incorporate these strategies. This work aimed to provide a framework to determin
Externí odkaz:
https://doaj.org/article/17bc4b81e84143c8b5e06251f8e446da
Autor:
Thyrza Z. Jagt, Tomas M. Janssen, Anja Betgen, Lisa Wiersema, Rick Verhage, Sanne Garritsen, Tineke Vijlbrief-Bosman, Peter de Ruiter, Peter Remeijer, Corrie A.M. Marijnen, Femke P. Peters, Jan-Jakob Sonke
Publikováno v:
Physics and Imaging in Radiation Oncology, Vol 24, Iss , Pp 7-13 (2022)
Background/purpose: In daily plan adaptation the radiotherapy treatment plan is adjusted just prior to delivery. A simple approach is taking the planning objectives of the reference plan and directly applying these in re-optimization. Here we present
Externí odkaz:
https://doaj.org/article/ffb216871bf3415a94cbbe631a92644f
Autor:
Chavelli M. Kensen, Tomas M. Janssen, Anja Betgen, Lisa Wiersema, Femke P. Peters, Peter Remeijer, Corrie A. M. Marijnen, Uulke A. van der Heide
Publikováno v:
Radiation Oncology, Vol 17, Iss 1, Pp 1-9 (2022)
Abstract Purpose To determine PTV margins for intrafraction motion in MRI-guided online adaptive radiotherapy for rectal cancer and the potential benefit of performing a 2nd adaptation prior to irradiation. Methods Thirty patients with rectal cancer
Externí odkaz:
https://doaj.org/article/bcd2c2c4c02a4354b63c0a50bf6677eb
Autor:
Tomas M. Janssen, Katharine Aitken, Filippo Alongi, Aisling Barry, Uffe Bernchou, Simon Boeke, William A. Hall, Ali Hosni, Petra.S. Kroon, Marcel Nachbar, Hina Saeed, Ina M. Jürgenliemk-Schulz, Tine Schytte, Helena M. Verkooijen, Marlies.E. Nowee
Publikováno v:
Technical Innovations & Patient Support in Radiation Oncology, Vol 22, Iss , Pp 50-54 (2022)
Summary: The treatment of oligometastatic disease using MR guidance is an evolving field. Since August 2018 patients are treated on a 1.5 Tesla MR-Linac (MRL). We present current workflows and practice standards from seven institutions for the initia
Externí odkaz:
https://doaj.org/article/3fd918ae39f0424799db5c879d0d234b
Autor:
Marlies E. Nowee, Vivian W.J. van Pelt, Iris Walraven, Rita Simões, Carmen P. Liskamp, Doenja M.J. Lambregts, Stijn Heijmink, Eva Schaake, Uulke A. van der Heide, Tomas M. Janssen
Publikováno v:
Physics and Imaging in Radiation Oncology, Vol 19, Iss , Pp 85-89 (2021)
Background and Purpose: Magnetic resonance (MR) guided radiotherapy utilizes MR images for (online) plan adaptation and image guidance. The aim of this study was to investigate the impact of variation in MR acquisition time and scan resolution on ima
Externí odkaz:
https://doaj.org/article/b675a3ef7d324c938a3712a347f1d82b
Autor:
Rick Keesman, Erik van der Bijl, Tomas M. Janssen, Tineke Vijlbrief, Floris J. Pos, Uulke A. van der Heide
Publikováno v:
Physics and Imaging in Radiation Oncology, Vol 15, Iss , Pp 85-90 (2020)
Background & purpose: Metallic prostheses distort the magnetic field during magnetic resonance imaging (MRI), leading to geometric distortions and signal loss. The purpose of this work was to develop a method to determine eligibility for MRI-guided r
Externí odkaz:
https://doaj.org/article/d91f7570e8e74a42aecb1372ae9280ce
Autor:
Rita Simões, Geert Wortel, Terry G. Wiersma, Tomas M. Janssen, Uulke A. van der Heide, Peter Remeijer
Publikováno v:
Physics and Imaging in Radiation Oncology, Vol 12, Iss , Pp 38-43 (2019)
Background and purpose: Automatic delineations are often used as a starting point in the radiotherapy contouring workflow, after which they are manually reviewed and adapted. The purpose of this work was to quantify the geometric differences between
Externí odkaz:
https://doaj.org/article/47795a91fd2142028a144d5c87d53957
Autor:
Agustinus J.A.J. van de Schoot, Wouter van den Wollenberg, Casper Carbaat, Peter de Ruiter, Marlies E. Nowee, Floris Pos, Baukelien van Triest, Jan-Jakob Sonke, Tomas M. Janssen
Publikováno v:
Physics and Imaging in Radiation Oncology, Vol 10, Iss , Pp 19-24 (2019)
Background & purpose: Clinical introduction of magnetic resonance (MR)-guided radiotherapy involves treatment planning while taking into account machine-specific characteristics. Our aim was to investigate the feasibility of high-quality MR-linac tre
Externí odkaz:
https://doaj.org/article/398e917a2fd04afda95389d93e32561f